/**
 * Copyright © 2010 DocuLibre inc.
 * This file is part of Constellio.
 * Constellio is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * Constellio is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with Constellio. If not, see <http://www.gnu.org/licenses/>.
 */
package com.doculibre.constellio.connector.persistence.services;

import javax.persistence.EntityManager;
import javax.persistence.EntityTransaction;

import com.doculibre.constellio.connector.persistence.config.PersistenceContext;

/**
 * Utils for managing transactions.
 * 
 * @author Nicolas Bélisle (nicolas.belisle@doculibre.com)
 */
public class PersistenceUtils {

	public static void beginTransaction(PersistenceContext context) {
		try {
			EntityManager entityManager = context.getCurrentEntityManager();
			EntityTransaction entityTransaction = entityManager
					.getTransaction();
			if (!entityTransaction.isActive()) {
				entityTransaction.begin();
			}
		} catch (Throwable e) {
			e.printStackTrace();
			throw new RuntimeException(e);
		}
	}

	public static void closeTransaction(PersistenceContext context) {
		EntityManager entityManager = null;
		EntityTransaction entityTransaction = null;
		try {
			entityManager = context.getCurrentEntityManager();
			entityTransaction = entityManager.getTransaction();
			if (entityTransaction.isActive()) {
				entityTransaction.commit();
			}
		} catch (Throwable e) {
			e.printStackTrace();
			if (entityTransaction != null) {
				entityTransaction.rollback();
			}
		} finally {
			if (entityManager != null) {
				entityManager.close();
			}
		}
	}

	public static void commitTransaction(PersistenceContext context) {
		EntityManager entityManager = null;
		EntityTransaction entityTransaction = null;
		try {
			entityManager = context.getCurrentEntityManager();
			entityTransaction = entityManager.getTransaction();
			if (entityTransaction.isActive()) {
				entityTransaction.commit();
			}
		} catch (Throwable e) {
			e.printStackTrace();
			if (entityTransaction != null) {
				entityTransaction.rollback();
			}
		}
	}
}
